TB 9-6625-170-24
(4) Set the EXCIT switch to 7V. Multimeter will read 6.93 to 5.07 V. If not,
perform b below. Place a 70 Ω resistor across the output. The output should not vary more
than 0.1%.
(5) Set the EXCIT switch to 10V. Multimeter will read 9.90 to 10.10 V. If not,
perform b below. Place a 100 Ω resistor across the output. The output should not vary
more than 0.1 %.
(6) Connect the TI to the multimeter without any load resistors. Set the multimeter
to read AC voltage. The multimeter shall read ≤ 1 mV rms.
b. Adjustments. None.
a. Performance Check
(2) Configure multimeter for dc volts measurement in auto range.
(3) Adjust the gain to 100. Adjust the coarse and fine zero controls counter-
clockwise until the stops are reached.
(4) The reading on the multimeter should be more negative than -4 volts. If not,
perform b below.
(5) Adjust the coarse and fine zero controls fully clockwise.
(6) The reading on the multimeter should be more positive than +4 volts. If not,
perform b below.
(7) Adjust the coarse and fine zero controls for zero output from the amplifier.
(8) For models with autozero, adjust the front-panel zero controls and offset the
output of the TI to 1 V.
(9) Press the auto zero switch to zero and release. Verify that the TI output returns
to 0 12 mV.
b. Adjustments. None.